(19)
(11) EP 1 245 963 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.02.2006 Bulletin 2006/08

(43) Date of publication A2:
02.10.2002 Bulletin 2002/40

(21) Application number: 02006944.9

(22) Date of filing: 26.03.2002
(51) International Patent Classification (IPC): 
G01S 5/14(2006.01)
 G01S 1/02(2006.01)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 27.03.2001 JP 2001090928

(71) Applicant: Pioneer Corporation
Meguro-ku, Tokyo (JP)

(72) Inventors:
  • Shioda, Takehiko, Corporate R & D Laboratory
    Tsurugashima-shi, Saitama 350-2288 (JP)
  • Nohara, Manabu, Corporate R & D Laboratory
    Tsurugashima-shi, Saitama 350-2288 (JP)

(74) Representative: Betten & Resch 
Patentanwälte, Theatinerstrasse 8
80333 München
80333 München (DE)

   


(54) Method and apparatus for positioning a mobile station


(57) A positioning apparatus and method for accurately determining a current position of a mobile station. The current position of the mobile station is determined utilizing radio waves arriving from a plurality of base stations installed in a communication area. For calculating a propagation range of a radio wave arriving from each base station, error correction processing is performed using a predetermined error correction coefficient previously calculated by measuring a radio wave propagation situation around each base station to estimate a propagation range of a direct wave within incoming radio waves. The current position of the mobile station is determined using the estimated propagation range and the positions of the respective base station.







Search report